Still searching for a place to look for old bottles around Dallas

I love walking creeks and rescuing old bottles that have been discarded. Back in the old days before we had a truck to come by and do it for us, the city would take the community trash to certain areas, mostly along creeks. If anyone recalls such areas, I would love to check it out! On the plus side,we are keeping them from being washed down into our waterways. Thanks a bunch.